Deformation and instability mechanism and control technology of mining gateway for Jurassic weak-cemented soft rock roadways

被引：0
|
作者：
Cai J. [1 ,2 ]
Tu M. [1 ]
Zhang H. [1 ]
机构：
[1] The MOE Key Laboratory of Coal mine Safety and High Efficiency Mining, Anhui University of Science and Technology, Huainan
[2] School of Architecture and Civil Engineering, West Anhui University, Lu'an
来源：
Tu, Min (mtu@aust.edu.cn) | 1600年 / China University of Mining and Technology卷 / 37期
关键词：
Control technology; Mechanism of roadway deformation and instability; Physical simulation; Weak-cemented soft rock;
D O I：
10.13545/j.cnki.jmse.2020.06.005
中图分类号：
学科分类号：
摘要：
In view of such difficult maintenance of weak-cemented soft rock after roadway excavation as roof failing and side slicing, with Bojianghaizi Coalmine as research background, the physical and mechanical characteristics of this soft rock were studied through XRD mineral composition analysis and electron microscope scanning. Mechanism of roadway deformation and control technology were then studied through actual site situation analysis and physical similarity simulation tests. The results have shown that weak-cemented soft rock is characterized by brittle deformation, low mechanical strength, and probable swelling and argillizating of rock when exposed to water. Under severe excavation disturbance, the lower part of the roof will generate large tensile stress, resulting in the overall instability of the anchorage arch and the formation of a loose roof in the anchorage area. Based on this, the coupling control technology for roadway destruction is proposed, namely, an "inverted trapezoid" bolt net cable and beam support structure with high strength and high pressures + straight wall cut arch for roadway section + full section grouting, which has good field application effect of reinforcing support with grouting when the rock is seriously broken. © 2020, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
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页码：1114 / 1122
页数：8
相关论文
共 22 条
  • [1] JIA Haibin, SU Lijun, QIN Zhe, Ground stress numerical inversion of roadways with weakly cemented strata, Journal of Shandong University of Science and Technology (Natural Science), 30, 5, pp. 30-35, (2011)
  • [2] WANG Weiming, WANG Lei, DAI Chunquan, Frozen wall deformation analysis in weakly cemented soft rock based on layered calculation of strength, Chinese Journal of Rock Mechanics and Engineering, 30, pp. 4110-4116, (2011)
  • [3] MENG Qingbin, HAN Lijun, QIAO Weiguo, Et al., Evolution of surrounding rock in pioneering roadway with very weakly cemented strata through monitoring and analyzing, Journal of China Coal Society, 38, 4, pp. 572-579, (2013)
  • [4] WANG Pu, ZHANG Baisheng, WANG Lei, Et al., Research on roof falling mechanism and support technology of mining roadway in expansive soft rock, Journal of Mining and Strata Control Engineering, 2, 2, pp. 53-61, (2020)
  • [5] ZHAO Zenghui, WANG Weiming, TAN Yunliang, Et al., Quantitative model of full section anchoring in thick soft rock tunnel, Journal of China Coal Society, 41, 7, pp. 1643-1650, (2016)
  • [6] ZHAO Zenghui, MA Qing, GAO Xiaojie, Et al., Non-synergistic deformation and catastrophic mechanism of surrounding rock of weakly cemented soft rock roadway, Journal of Mining & Safety Engineering, 36, 2, pp. 272-279, (2019)
  • [7] HE Manchao, CHEN Xin, LIANG Guoping, Et al., Software system for large deformation mechanical analysis of soft rock engineering at great depth, Chinese Journal of Rock Mechanics and Engineering, 26, 5, pp. 934-943, (2007)
  • [8] HE Manchao, YUAN Yue, WANG Xiaolei, Et al., Control technology for large deformation of Mesozoic compound soft rock in Xinjiang and its application, Chinese Journal of Rock Mechanics and Engineering, 32, 3, pp. 934-943, (2013)
  • [9] KANG Hongpu, LIN Jian, WU Yongzheng, High pretension stress and intensive cable bolting technology set in full section and application in entry affected by dynamic pressure, Journal of China Coal Society, 34, 9, pp. 1153-1159, (2009)
  • [10] (2017)
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